Louis Tomlinson breaks his silence one month after sister passes away

In a short statement, Louis thanked his fans for their support, writing, "Just wanted to thank everyone for their lovely words over the past couple of weeks. Back in the studio today to vocal something I wrote a few months ago. Sending you all loads of love x."

Félicité was found by authorities on March 13 in her apartment, after she reportedly collapsed from a heart attack.

“Police are in the process of informing her next of kin,” police wrote in a statement. “At this stage, the death is being treated as unexplained. A post-mortem examination will take place in due course."

At the time, Louis' rep confirmed toUs Weeklythat the cause of death was a heart attack.